Start Date: Jul 01, 2010
End Date: Dec 31, 2012
A whole-population cross-sectional survey of Alabama, Mississippi, Louisiana, and Arkansas catfish farmers will be used to evaluate putative risk factors that contribute to vaccine efficacy on the catfish farm. Other fish health questions may also be evaluated. The data will be obtained from the 2010 National Animal Health Monitoring System (NAHMS) Catfish Survey, conducted by the U.S. Department of Agriculture, Animal Plant Health Inspection Service, Veterinary Services (USDA, APHIS, VS). Risk factors to be explored will include stocking densities, feeding practices (frequency during winter, form of feed fed, withholding feed during disease outbreak), pond renovation/fallowing/preparation procedures, aerator use, farm size, and record keeping. In addition to descriptive summaries of results, multi-variable regression analysis with potential outcome variables being perceived change in disease loss before and after the use of vaccination, and level of producer satisfaction with the vaccine, will be used to analyze the data. If there are not enough farmers using vaccinated fish in the four states, the number of risk factors in the analysis may be reduced to achieve the statistical power necessary for the regression analysis. Alternatively, survey results will be published as a univariate analysis and/or as a descriptive survey of the use of vaccination by the U.S. catfish industry.